Description: Visually not unlike the more widespread, sorediate species C. flavovirens, but the yellow in this species emanates from the yellow-pruinose discs not the soredia, which in C. chrysophthalma are entirely absent. Discs numerous, spherical; occasionally forming tuber-like clusters. In Ireland, it can be found on the bark of broadleaved trees. It is not a deep-shade species. Northern, eastern and south-west Ireland.

Key Identification Features:

• Thallus, grey, stain-like, soredia absent
• Discs numerous, tiny, yellow-pruinose; UV+ orange.

Original text submitted by Vince J. Giavarini

Distribution Map from NBN: Chrysothrix chrysophthalma at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Chrysothrix chrysophthalma at iNaturalist World Species Observations database.